WO2015022046A1

WO2015022046A1 - Valve assembly for an is machine

Info

Publication number: WO2015022046A1
Application number: PCT/EP2014/001975
Authority: WO
Inventors: Matthias Lunacek; Benedikt Felgenhauer; Michael Winkler; Dirk Winkelhake; Kai Buschmann; Wilfried Seidensticker; Markus Jochens; Thomas Hartmann
Original assignee: Heye International Gmbh
Priority date: 2013-08-12
Filing date: 2014-07-21
Publication date: 2015-02-19
Also published as: DE102013013312A1; US20160200619A1; EP3033555A1; MX2016001636A; US9790118B2; MX366585B; EP3033555B1; ES2632256T3

Abstract

A valve assembly (1) which is intended for differentiated track-by-track control of the movement mechanisms of an IS machine and can therefore be used in a modular manner consists of a valve support (2') and a head part (22) which supports two pilot control valves (3, 5), two safety valves (4, 6) and two switching valves as one assembly. By way of actuation of the safety valves (4, 6), the feed of control air to the switching valves can be interrupted, which switching valves are assigned, for example, to the opening movement and the closing movement, respectively, of a closing cylinder which is assigned to a preform. The valve assembly has interfaces for connection of control and operating air and for electric connection to a machine controller. If required, the assembly which is designed in this way makes it possible to interrupt the control air in a differentiated way which is related to an individual track, in addition to simple assembly and dismantling.

Description

DESCRIPTION

Valve assembly for an I.S. machine

The invention relates to a valve assembly according to the preamble of claim 1.

It is known in the applicant's home, for pneumatic actuation, for example, to use the closing mechanisms of the preforms and finish molds of an I.S. machine valve assemblies, which are all mounted on a valve block, which in turn is connected to a machine frame with the interposition of an adapter plate. Each of the valve assemblies consists of a two cartridge cartridges receiving cartridge carrier, which are each controlled via a selectively electrically or manually operable pilot valve. The pilot valves arranged for the control of switching valves represented by the switching cartridges control the movement of the respective mold halves, safety valves have been formed in the case of a guided via the adapter plate separate working air supply between this and an air manifold or without separate working air supply by another external valve. A lane by train, that is limited to a single valve assembly interruption of the control air is not provided here, with additional equipment tracks with independent safety valves associated with increased space requirements for their accommodation and in many cases is not or hardly representable for reasons of space.

A similar problem exists in connection with the control of the other mechanisms associated with the I.S. machine, also mounted on the valve manifold.

In the course of expected in the future in terms of safety at work tightened legal requirements, the need has arisen to equip a larger number of tracks with a safety valve, a requirement that is often difficult to meet with conventional technology, especially for reasons of space. However, from a control point of view is a cascade consisting of a pilot valve controlling the electrical signal, which in turn actuates the switching valve and reaches the respective closing mechanism via an external safety valve, not desirable.

It is therefore the object of the invention to design a valve assembly of the type described with regard to the trace-wise representation of the function of a safety valve, in particular while maintaining a compact, space-saving design. This object is achieved in such a valve assembly by the features of the characterizing part of claim 1.

It is essential to the invention hereinafter that a valve carrier, thus an assembly on which or in which at least one pilot valve and a working valve are arranged, is additionally set up for attaching a safety valve. In this way, results in a modular handle valve assembly, which is characterized by a high degree of integration, since all, a movement mechanism related control and safety functions are summarized in an assembly. This allows a track-wise equipment also with

Safety valves, without this to a relevant extent additional

Construction volume is needed. In particular, existing I.S. machines using these valve assemblies can be retrofitted in a simple manner for the purpose of meeting future legal requirements relating to safety at work without much effort.

The integrated safety valve in the valve carrier consists according to the features of claim 2 of a shaft which is slidably received in a bore, wherein an opening and a closed position can be represented by the displacement position of the shaft within this bore. For the structural representation of these positions, a simple solution results from a, in the surface of said shaft incorporated, axially limited annular space, via which in connection with lateral bores a continuous connection in the sense of a closed or open position is easy to represent. The safety valve is according to the features of claim 3 in the flow path of the control air between a pilot valve and a switching valve. Without activation, the respective last position of the switching valve, which is used immediately, for example, for controlling the movement of the lock cylinder of a pre-mold or finished mold, remains unchanged. The necessary for the flow of the control air bores are readily accommodated within the valve body.

The valve carrier is equipped according to the features of claim 4 with interfaces for supply and discharge of control and working air, to which interfaces for electrical connection to a machine control to be added. The valve carrier is in this way, if necessary, readily exchangeable as a unit, z. B. in the context of maintenance or repair activities.

Each pilot valve is set up according to the features of claim 5 either electrically or manually controllable. In this way, a high degree of operational flexibility is shown.

According to the features of claim 6, each switching valve consists of an exchangeable within the valve carrier arranged switching cartridge, which is to be regarded as a switching cartridge each functional unit, the moving parts to

Represent a closed and an open position and thus can fulfill the function of a valve. Essential in this context is that the switching cartridge is easily replaceable in case of wear.

The opening and closing movement of a movement mechanism are each assigned a switching valve according to the features of claim 7, wherein, for example, each remaining, that is set without a movement reference switching position is secured by spring force. As a rule, two switching valves are thus accommodated in a valve assembly, in particular a valve carrier.

At least the opening or the closed position of each safety valve can be locked according to the features of claim 8, so that insofar as intentional, under certain circumstances accident hazards associated with switching operations can be prevented.

According to the features of claims 9 and 10, the valve carrier consists of a, a cylindrical space for receiving the / switching cartridges having cartridge carrier which is closed at the end by a cover or a head part. The preferably also releasably connected to the cartridge carrier in connection headboard can simultaneously serve as a carrier for a pilot valve and a safety valve. This results in a module-like manageable assembly, which includes all control and backup functions in this case.

The features of claims 11 to 13 are directed to further advantageous embodiments of both the safety valve and the pilot valve. It can be seen that with the valve assembly according to the invention all lanes of an I.S.Maschine can be modularly equipped so that in each case future statutory standards can be met.

The invention will be explained in more detail below with reference to the schematically illustrated in the accompanying drawings embodiment. Show it:

Fig. 1 is a perspective view of the valve assembly according to the invention;

FIG. 2 shows a sectional view corresponding to a plane II-II of the valve assembly according to FIG. 1 with opened safety valves; FIG.

FIG. 3 is a plan view of the valve assembly of FIG. 2 with closed safety valves; FIG.

4 shows a representation of the installation situation of the valve assembly according to FIG. 1 in a vertical section;

Fig. 5 is a representation of the installation situation of the valve groups of FIG. 1 in a partial horizontal section. Fig. 1 shows a valve assembly 1 in its entirety, which consists of a, an upper and a lower cartridge cartridge cartridge carrier 2 ^{, which} forms a modular handle valve carrier 2 ^' together with a cover member 22, the valve carrier 2 ^' carries, an upper switching cartridge associated pilot valve 3 together with safety valve 4 and one of the lower cartridge associated pilot valve 5 together with safety valve 6. The function of the two switching cartridges will be explained below.

This valve assembly 1 is assigned in a manner to be explained in the following to the motion mechanism, not shown in the drawing, of the preform of an I.S. machine and is thus set up to control the opening and closing of the preforming shafts.

As shown in detail in Figures 4 and 5, the valve assembly 1 is in the installed state via a valve block 7 with the machine frame 8 of the ISMmaschine in connection, which is adapted for mounting a plurality of such valve assemblies 1, each for controlling a particular Movement mechanism are determined. Between the machine frame 8 and the valve block 7 is an adapter plate. 9

Reference will initially be made below to the drawing figures 2 and 3, which each show a valve assembly 1 with different switching positions of the safety valves 4, 6.

Both pilot valves 3, 5 are selectively controlled manually via a hand lever 10, 11 or electrically between an open and a closed position.

In the open position of the manual shift lever 10 shown in FIG. 2 control air passes through a bore 11, an annular space 12 surrounding a shaft 14 of the safety valve 4 and a further bore 13 to an upper switching cartridge 15, which forms a switching valve 15 ^' for working air and between a releasing an outflow of working air and a discharge blocking position is switchable. In the same way passes in the illustrated open position of the manual shift lever 11 control air via a bore 16, a, a shaft 17 of the safety valve 6 surrounding annular space 18 and a further bore 19 to a lower switching cartridge 20, which forms a switching valve 20 ^' for working air and between a one

Outflow of working air releasing and blocking a discharge of working air blocking position is switchable.

At 21, a lid is designated, by means of which the switching cartridges 15, 20 receiving space is completed at its lower end. The bore 13 extends within a head portion 22, through which the upper end of said space is closed and which carries the safety valve 4 and the pilot valve 3.

For the opening movement and for the closing movement here of the preform of an IS machine, a respective switching cartridge 15, 20 is provided. As a switching cartridge, basically any structural unit can be used which comprises a movable structure for the representation of the respective opening or closing position. The two switching valves 15 ^' , 20 ^' shown by the switching cartridges 15, 20 are practically always in opposite switching positions, so that an opening of the one switching valve is connected to a closure of the other switching valve and vice versa. In each case a position of these switching valves 15 ^' , 20 ^' is through

Spring force secured.

The two safety valves 4, 6 are identical to one another and consist of a respectively in a bore 23, 24 of the head part 22 and the Patronenr- carrier 2 screwed guide bushings 25, 26, within which the respective shaft 14, 17 is slidably received. The bores are within the head portion 22 and the cartridge carrier 2 in further coaxially extending

Holes 27, 28 continued.

At the protruding from the head portion 22 and the cartridge carrier 2 ends of the shafts 14, 17 is in each case a switching knob 29, 30, in conjunction with a spring 31, 32 and a locking mechanism in the open position shown in Figure 2, in the over Annular space 12, 18 of the respective shaft 14, 17 a continuous connection between the holes 11, 13 and the bores 16, 19 is made, and the closed position shown in Fig. 3, in which this connection is locked, can be locked.

With 31, 32 sealing rings are designated, via which said annulus is sealed on both sides in the axial direction.

33 is a bore 34 of the valve block 7 continuing bore referred to, the supply of working air to a moving mechanism and the discharge of working air from the movement mechanism in conjunction with the lower

Switching cartridge 20 of the valve assembly 1 is used.

Indicated at 35 is a bore continued in a bore 36 of the valve block 7, which serves for the supply of working air to a movement mechanism and the discharge of working air from the movement mechanism in conjunction with the upper switching cartridge 15 of the valve assembly 1.

Denoted at 37 is a bore within the valve block 7, which serves for the central supply of working air to the valve assembly 1, to the lower switching cartridge 20th

Denoted at 38 is a bore within the valve block 7, which serves for the central supply of working air to the valve assembly 1, to the upper switching cartridge 15th

With a bore 39 is designated within the valve block 7, which is intended to guide exhaust air of the lower switching cartridge 20.

With a bore 40 is designated within the valve block 7, which is intended to guide exhaust air of the upper switching cartridge 15.

Control air is passed through the valve block 7 with the proviso that the application of the one switching valve 15 ^' , 20 ^' towards an open position always triggers the admission of the other switching valve in the direction of a closed position.

Working air is fed via a common for all valve assemblies 1 of a valve block 7 working air duct or alternatively fed externally to the valve assembly 1.

The safety valves 4, 6 are located in the path guiding the control air between the pilot valves 3, 5 and the switching valves represented by the switching cartridges 15, 20.

Merely as an example of a movement mechanism to be actuated by means of the valve assembly 1, the lock cylinder 41 of a preform not shown in the drawing is designated in FIG. 4. In this there is a piston 42 connected to the preform halves to be controlled, one side 43 of which can be acted upon via a line connected to the bore 33 and the other side 44 via a line connected to the bore 35. In accordance with the action on the bores 33, 35, the preform can be opened or closed.

A valve assembly 1 is detachably connected as a structural unit with the valve block 7. To actuate a movement mechanism via the valve assembly 1, the respective pilot valve 3, 5 either manually by operating the hand lever 10, 11 or electrically by a machine control of the I.S. -Machine activated so that control air reaches the selected switching valve, which

Runs working air to the driven movement mechanism and thus triggers its movement. This working exhaust air flows through holes in the adapter plate 9, the valve block 7 via the switching valve in a common exhaust air collection channel.

By actuation of the respective safety valves 4, 6 and their locking a supply of control air is suppressed to the respective switching valve, so that a random control of the movement mechanism is prevented. By valve assemblies according to the invention a summary of the functions of a pilot valve support, a switch valve carrier and a safety valve carrier are achieved in a simple and in particular volume-saving manner and provides the possibility of a differentiated track-wise interruption of the control air.

LIST OF REFERENCE NUMBERS

1. Valve assembly

2. Cartridge carrier

2 '. valve

3rd pilot valve

4. safety valve

5. pilot valve

6. safety valve

7. Valve block

8. Machine frame

9. Adapter plate

10. Hand lever

11. Hand lever

12th annulus

13. Bore

14th shaft

15. Switch cartridge

15 '. switching valve

16th hole

17th shaft

18th annulus

19. Drilling

20. Switch cartridge

20 '. switching valve

21. Lid

22nd headboard

23. Drilling

24. Bore

25. Guide bush

26. Guide bush

27. Drilling

28. Drilling

29. Switch button

30. Switch button

31. Sealing ring

32. sealing ring

33. drilling

34. Bore

35. Bore

36. Bore

37. Bore

38. Bore

39. Bore

40. Bore

41. Lock cylinder

42nd piston

43. page

44th page

Claims

A valve assembly (1) for controlling one of the moving mechanisms of an IS machine, comprising at least one pilot valve (3, 6) and a switching valve (15 ^' , 20 ^' ) for controlling the working air for the moving mechanism, with a, by a for Attachment of both the pilot valve (3, 6) and the switching valve (15 ^' , 20 ^' )), one of the movement mechanisms associated modularly manageable valve carrier (2 ^' ), characterized in that the valve carrier (2 ^' ) in addition to at least one safety valve (4, 6) is equipped.

2. Valve assembly (1) according to claim 1, characterized in that each safety valve (4, 6) arranged in one, in a bore (23, 24) of the valve carrier () between an opening and a closed position representing position axially displaceable Shaft (14, 17).

3. Valve assembly (1) according to claim 1 or 2, characterized in that each safety valve (4, 6) in the flow path of the control air between the pilot valve (3, 5) and the switching valve (15 ^' , 20 ^' ) is arranged.

4. Valve assembly (1) according to one of claims 1 to 3, characterized in that the valve carrier (2 ^' ) is equipped with interfaces for supplying control and working air.

5. Valve assembly (1) according to one of claims 1 to 4, characterized in that the pilot valve (3, 6) is set up either manually or electrically controllable.

6. Valve assembly (1) according to any one of claims 1 to 5, characterized in that each switching valve (15 ^' , 20 ^' ) by an exchangeable within the valve carrier (2 ^' ) arranged switching cartridge (15, 20) is formed.

7. Valve assembly (1) according to one of claims 1 to 6, characterized in that in each case the opening and closing movement of a movement mecha- ism a switching valve (15 ^' , 20 ^' ) is associated, and that in each case a switching position of the switching valve is secured by spring force.

8. Valve assembly (1) according to one of claims 2 to 7, characterized in that at least the opening or the closed position of a safety valve (4, 6) are lockable.

9. valve assembly (1) according to one of claims 6 to 8, characterized in that the cartridge carrier (2) as part of the valve carrier (2 ^' ) has a cylindrical, for receiving the two switching valves (15 ^' , 20 ^' ) furnished space which is closed at its one end by a lid (21) and at its other end by a head part (22).

10. Valve assembly (1) according to claim 9, characterized in that the

Head part (22) forms a support for both a pilot valve (3) and a safety valve (4).

11. Valve assembly (1) according to one of claims 2 to 10, characterized in that in each case the two switching positions of the safety valve (4, 6) is secured by spring force.

12. Valve assembly (1) according to any one of claims 1 to 11, characterized in that the pilot valve (3, 5) releasably connected to the valve carrier () is in communication.

13. Valve assembly (1) according to any one of claims 1 to 12, characterized in that the safety valve (4, 6) releasably connected to the valve carrier () in

Connection stands.